#include "stdafx.h"
#include <iostream>
#include <vector>
#include <string>
using namespace std;

int main()
{
    cout << "Hello, world!" << endl;
    cout << "Hello, world!" << endl;
    cout << "Hello, shanghai!" << endl;
    vector<int> vint {10, 20, 30, 40};
    for (int x : vint)
    {
        cout << x << endl;
    }
    for (auto x : vint)
    {
        cout << x << endl;
    }
    vector<string> vstr {"10", "20", "30", "40"};
    for (auto x : vstr)
    {
        cout << x << endl;
    }
    return 0;
}
